<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
financial statements for Sonus Corp. and is qualified in its entirety by
reference to such financial statements.
</LEGEND>
<CIK> 0001029260
<NAME> SONUS CORP.
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 3-MOS
<FISCAL-YEAR-END> JUL-31-2001
<PERIOD-START> AUG-01-2000
<PERIOD-END> OCT-31-2000
<CASH> 1,334
<SECURITIES> 0
<RECEIVABLES> 11,775
<ALLOWANCES> (3,874)
<INVENTORY> 769
<CURRENT-ASSETS> 12,349
<PP&E> 12,552
<DEPRECIATION> 4,863
<TOTAL-ASSETS> 39,468
<CURRENT-LIABILITIES> 12,865
<BONDS> 1,046
0
25,561
<COMMON> 14,981
<OTHER-SE> (14,895)
<TOTAL-LIABILITY-AND-EQUITY> 39,468
<SALES> 10,863
<TOTAL-REVENUES> 13,562
<CGS> 4,335
<TOTAL-COSTS> 9,311
<OTHER-EXPENSES> 4,060
<LOSS-PROVISION> 182
<INTEREST-EXPENSE> 20
<INCOME-PRETAX> 104
<INCOME-TAX> 0
<INCOME-CONTINUING> 104
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 104
<EPS-BASIC> 0.02
<EPS-DILUTED> 0.01
</TABLE>